and yes either way hematoma (bruise) or bursting ear canal could theoretically bleed. The eustachean tube that leads from the middle ear
on to the back of the throat
. Possibly there was some bleeding, the blood drained down the eustachean tube, this would cause the taste of blood.
One quick self test is to pinch your nose, and bow out, like you do when trying to equalize pressure in a plane. If you hear wind rushing out of your ear, you probably did burst your ear drum.